Abstract
Ti-Al-C composite materials were produced by SHS (Self-propagating High-temperature Synthesis) -Pseudo-HIP (Hot Isostatic Pressing) method. The self-propagating reaction of Ti, Al and C occurred at aluminum melting temperature (933 K). The synthesis conditions to attain high density materials with finely dispersed particles of Ti-Al-C ceramics were confirmed. The composites synthesized at atomic composition of Ti45Al45C10 consisted of TiAl matrix dispersed with the Ti2AlC fine particles of 1-5μm. The micro-hardness and yield stress of this material were, respectively, 4.6 GPa and 1.1 GPa which were much higher than those of Ti-46Al. The wear rate of this composite was approximately 80% of pure tungsten and the constanct to sliding rates.
